I am not an expert on weather phenomena, but as far as I know derechos are long-lived, fast-moving fronts of extremely strong winds that are associated with severe thunderstorm systems. They usually last several hours and affect large areas of land (sometimes multiple states). As a result they are often very damaging. You may want to ask this in the Weather category for more precise answers.
Derechos are actually in the forecast for a large chunk of the Midwest US today!
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I am not an expert on weather phenomena, but as far as I know derechos are long-lived, fast-moving fronts of extremely strong winds that are associated with severe thunderstorm systems. They usually last several hours and affect large areas of land (sometimes multiple states). As a result they are often very damaging. You may want to ask this in the Weather category for more precise answers.
Derechos are actually in the forecast for a large chunk of the Midwest US today!
http://www.cbsnews.com/8301-201_162-57588861/long-...
http://en.wikipedia.org/wiki/Derecho
http://www.spc.noaa.gov/misc/AbtDerechos/derechofa...